<template name="w-picker">
	<view class="w-picker" :key="createKey" :data-key="createKey">
		<view class="mask" :class="{'visible':visible}" @tap="onCancel" @touchmove.stop.prevent catchtouchmove="true"></view>
			<view class="w-picker-cnt" :class="{'visible':visible}">
				<view class="w-picker-header"  @touchmove.stop.prevent catchtouchmove="true">
					<text @tap.stop.prevent="onCancel">取消</text>
					<slot></slot>
					<text :style="{'color':themeColor}" @tap.stop.prevent="pickerConfirm">确定</text>
				</view>
				
				<range-picker
					v-if="mode=='range'" 
					class="w-picker-wrapper"
					:startYear="startYear"
					:endYear="endYear"
					:value="value"
					:item-height="itemHeight"
					:current="current"
					@change="handlerChange"
					@touchstart="touchStart" 
					@touchend="touchEnd">
				</range-picker>
							
			</view>
		</view> 
	</view> 
</template>

<script>
	import rangePicker from "./range-picker.vue"
	
		export default {
			name:"w-picker",
			components:{
				// datePicker,
				 rangePicker,
				// halfPicker,
				// timePicker,
				// selectorPicker,
				// shorttermPicker,
				// regionPicker,
				// linkagePicker,
				// weekPicker,
				// halfyearPicker,
				// quarterPicker
			},
			props:{
				mode:{
					type:String,
					default:"date"
				},
				value:{//默认值
					type:[String,Array,Number],
					default:""
				},
				current:{//是否默认显示当前时间，如果是，传的默认值将失效
					type:Boolean,
					default:false
				},
				themeColor:{//确认按钮主题颜色
					type:String,
					default:"#f5a200"
				},
				fields:{//日期颗粒度:year、month、day、hour、minute、second
					type:String,
					default:"date"
				},
				disabledAfter:{//是否禁用当前之后的日期
					type:Boolean,
					default:false
				},
				second:{//time-picker是否显示秒
					type:Boolean,
					default:true
				},
				options:{//selector,region数据源
					type:[Array,Object],
					default(){
						return []
					}
				},
				defaultProps:{//selector,linkagle字段转换配置
					type:Object,
					default(){
						return{
							label:"label",
							value:"value",
							children:"children"
						}
					}
				},
				defaultType:{
					type:String,
					default:"label"
				},
				hideArea:{//mode=region时，是否隐藏区县列
					type:Boolean,
					default:false
				},
				level:{
					//多级联动层级，表示几级联动,区间2-4;
					type:[Number,String],
					default:2
				},
				timeout:{//是否开启点击延迟,当快速滚动 还没有滚动完毕点击关闭时得到的值是不准确的
					type:Boolean,
					default:false
				},
				expand:{//mode=shortterm 默认往后拓展天数
					type:[Number,String],
					default:30
				},
				startYear:{
					type:[String,Number],
					default:1970
				},
				endYear:{
					type:[String,Number],
					default:new Date().getFullYear()
				},
				visible:{
					type:Boolean,
					default:false
				}
			},
			created() {
				this.createKey=Math.random()*1000;
			},
			data() {
				return {
					itemHeight:`height: ${uni.upx2px(88)}px;`,
					result:{},
					confirmFlag:true
				};
			},
			methods:{
				touchStart(){
					if(this.timeout){
						this.confirmFlag=false;
					}
				},
				touchEnd(){
					if(this.timeout){
						setTimeout(()=>{
							this.confirmFlag=true;
						},500)
					}
				},
				handlerChange(res){
					let _this=this;
					this.result={...res};
				},
				show(){
					this.$emit("update:visible",true);
				},
				hide(){
					this.$emit("update:visible",false);
				},
				onCancel(res){
					this.$emit("update:visible",false);
					this.$emit("cancel");
				},
				pickerConfirm(){
					if(!this.confirmFlag){
						return;
					};
					this.$emit("confirm",this.result);
					this.$emit("update:visible",false);
				}
			}
		}

</script>

<style lang="scss">
	.w-picker-item {
	  text-align: center;
	  width: 100%;
	  height: 88upx;
	  line-height: 88upx;
	  text-overflow: ellipsis;
	  white-space: nowrap;
	  font-size: 30upx;
	}
	.w-picker{
		z-index: 888;
		.mask {
		  position: fixed;
		  z-index: 1000;
		  top: 0;
		  right: 0;
		  left: 0;
		  bottom: 0;
		  background: rgba(0, 0, 0, 0.6);
		  visibility: hidden;
		  opacity: 0;
		  transition: all 0.3s ease;
		}
		.mask.visible{
			visibility: visible;
			opacity: 1;
		}
		.w-picker-cnt {
		  position: fixed;
		  bottom: 0;
		  left: 0;
		  width: 100%;
		  transition: all 0.3s ease;
		  transform: translateY(100%);
		  z-index: 3000;
		  background-color: #fff;
		}
		.w-picker-cnt.visible {
		  transform: translateY(0);
		}
		.w-picker-header{
		  display: flex;
		  align-items: center;
		  padding: 0 30upx;
		  height: 88upx;
		  background-color: #fff;
		  position: relative;
		  text-align: center;
		  font-size: 32upx;
		  justify-content: space-between;
		  border-bottom: solid 1px #eee;
		  .w-picker-btn{
		  	font-size: 30upx;
		  }
		}
		
		.w-picker-hd:after {
		  content: ' ';
		  position: absolute;
		  left: 0;
		  bottom: 0;
		  right: 0;
		  height: 1px;
		  border-bottom: 1px solid #e5e5e5;
		  color: #e5e5e5;
		  transform-origin: 0 100%;
		  transform: scaleY(0.5);
		}
	}
</style>